文献类型：期刊文献

英文题名：All-Fiber Fabry-Perot Interferometer Gas Refractive Index Sensor Based on Hole-Assisted One-Core Fiber and Vernier Effect

作者：Pan, Rui[1,2];Yang, Wenlong[1,2];Li, Linjun[1,2];Yang, Yuqiang[1,2,3];Yu, Xiaoyang[1,2];Fan, Jianying[1,2];Yu, Shuang[1,2];Xiong, Yanling[4];Zhang, Lijie[5]

机构：[1]Harbin Univ Sci & Technol, Heilongjiang Prov Key Lab Laser Spect Technol & A, Harbin 150080, Peoples R China;[2]Harbin Univ Sci & Technol, Sch Measurement & Commun Engn, Harbin 150080, Peoples R China;[3]Guangdong Ocean Univ, Sch Elect & Informat Engn, Zhanjiang 524088, Peoples R China;[4]Harbin Univ Sci & Technol, Dept Phys, Sch Sci, Harbin 150080, Peoples R China;[5]Jilin Univ, Coll Construct Engn, Changchun 130021, Peoples R China

年份：2021

卷号：21

期号：14

起止页码：15417

外文期刊名：IEEE SENSORS JOURNAL

收录：SCI-EXPANDED(收录号：WOS:000673632700001)、、EI(收录号：20211810302564)、Scopus(收录号：2-s2.0-85105116275)、WOS

基金：This work was supported in part by the National Key Research and Development Project under Grant 2019YFC1804802; in part by the Natural Science Foundation of Heilongjiang Province under Grant YQ2019A004, Grant LH2019F022, and Grant F2017012; in part by the National Natural Science Foundation of China under Grant 51777046, Grant 51672062, and Grant 51575149; and in part by the National Science Foundation for Post-doctoral Scientists of Heilongjiang Province under Grant LBH-Z19070.

语种：英文

外文关键词：Fabry-Perot interferometer; HAOCF; Vernier effect; gas refractive index

外文摘要：A novel high sensitivity all-fiber Fabry-Perot interferometer (FPI) gas refractive index (RI) sensor based on hole-assisted one-core fiber (HAOCF) and Vernier effect was proposed and demonstrated. The sensor is fabricated by splicing a section of HAOCF to a section of silica tube (ST) fused with the lead-in single-mode fiber (SMF), ensuring that the sensor is composed of an air-cavity FPI and a silica-cavity FPI. The cascaded dual-cavities generate the Vernier effect due to a similar free spectrum range (FSR), which significantly improve the sensitivity of the sensor. Owing to the air hole in the cladding of the HAOCF, gases with different RI can enter or leave the in-fiber air cavity, which makes the device usable as a gas I sensor. The sensor was used to monitor the RI changes of air with different pressures and provided a high sensitivity of -9462.4 nm/RIU. The proposed sensor has a potential to find further applications in the fields of gas composition detection, medical diagnostics and environmental monitoring.